PHOTON SCIENCE

NRS experiments are performed in all three experimental hutch (EH1, EH2 and EH3). High resolution monochromators (HRMs) for studies on nuclear transitions of ⁵⁷Fe, ¹¹⁹Sn, ¹²¹Sb, ¹²⁵Te (plus several more in the 20 to 40 keV range) and ¹⁹³Ir are implemented. Main elements are a 1.0 meV silicon high resolution monochromator (HRM) for iron ⁵⁷Fe at 14.41 keV and a 0.7 meV HRM for ¹¹⁹Sn at 23.88 keV plus a medium resolution monochromator for ¹⁹³Ir at 72.9 keV installed in EH1 and a backscattering HRM for the other nuclear transitions installed in EH3. A theta-two-theta setup is installed in the second experimental hutch EH2. A KB-mirror system in EH3 provides focussing down to a spot size of about 4 micron x 7 micron (vert. x horz.) on the sample at 14.41 keV.
More moderate focussing with about 100 to 300 microns size in each direction is provided by the use of a variable number of one or two dimensional compound refractive Be lenses. The latter allows e.g. for NIS studies on small (layer) systems, reflectivity studies and a combination of NRS with GISAXS experiments.
A cross-polarizer-analyzer polarimeter installed in EH2 allows for polarization studies with a purity of 10^-9 at best.
User operation for Nuclear Resonant Scattering (NRS) experiments started in November 2011. Beamtime applications for NRS experiments on the five above mentioned isotopes are accepted. Several other isotopes are within the reachable energy range of the backscattering HRM. Contacting the beamline stuff in case of uncertainties concerning the feasibility of the desired experiments is highly recommended.